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4 Replies

It may be that you cannot connect to other layers without having vias defined. If you Mirror a component, can you then route on the bottom layer?

2. -Unable to fanout

As above, without vias defined I suspect you cannot create a fanout. As all my boards have vias defined, I can't try this.

3. -not vias

Enter Constraint Manager and go to Physical domain > Physical Constraints > All Layers. You will see a column named Vias, which I suspect is blank. Double-click on the cell in the Vias column and the Edit Via List form will open where you can double-click a via in the left pane to move it to the right pane. When done, close CM and you should then be able to place a via you added to the Via List.

Once you get all these issues resolved, I suggest exploring the Working Layer mode which is now available in even the L license with 16.3. For more than 2 layers, I think it's definitely the way to go.

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